Curiosity on Mars photographed this strange form August 23, 2013
I surrounded in white "THING" and I enlarged. could think of a Martian emerges from its "engine"! ? !
See the photo here, taken by robot Curiosity ground August 23, 2013, and posted on the official website this August 23, 2013.
The details of the photo are: NavCam Right B, SOL 372
There is also this other photo, which shows the "THING" photographed from a different angle:
The photo in question is here, in the list on the official website:
These potential vehicles photographed on Mars
ANOMALY ON MARS: PHOTOS: